Hub-turning lathe.



No. 647,384. Patentecj Apr. l0, |900.

G. A. ENSIGN. HUB TURNING LATHE. (Appximio'n mea .my 1s, 1899.)

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No. 547,384, Patented Apr. lo, `moo'. G. A. ENSIGN. HUB TURNING LATHE.

(Application med Jply x9, 1899.) A 4 (No Muriel.) 3 Sheets-Sheet 2'.

W/T/VESSES A TTOHNEYS No. 647,384. Patented Apr. I0, |900.

G. A. ENS

HUB lTumumi E. (Application Bled July 19 189`9.)

W/TNESSES:

NITED STATES PATENT OFFICE.

GEORGE A. FNSIGN, OF DEFIANOE, OHIO, ASSIGNOR TO THE DEFIANOE MACHINE WORKS, OF SAME PLACE.

HUB-TURNING LATHE.

SPECIFICATION forming part of Letters Patent No. 647,384, dated April l0, 1900.

Application filed July 19, 1899.

To all whom, it may conce-771e.-

Be it uknown that I, GEORGE A. ENSIGN, of Deiiance, in the county of Defiance and State of Ohio, have invented a new and Improved Hub-Turnin g Lathe, of which the following is a full, clear, and exact description.

The invention relates to wood-working machinery; and its object is to provide a new and improved turning-machine more especially designed for automatically turning vehicle-wheel hubs and arranged to produce very smooth work, to turn out a large number of hubs in a given time, and to turn hubs of various shapes with the cutting-angle of the knives or cutters practically the same for all sizes of hubs and with the strain in the direction of the greatest strength of the machine.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification, in which similar-characters of reference indicate corresponding parts in all the views.

Figure l is a perspective view of the im provement. Fig. 2 is an enlarged transverse section of the same. Fig. 3 is an enlarged front view of one of the cutting-knives and its gage. Fig. 4 is a transverse section of the same. Fig. 5 is an enlarged front elevation of the peripheral shaping or finishing knife and its gage. Fig. Gis an end elevation of the same. Fig. 7 is a plan View of the same. Fig. 8 is an enlarged side elevation of the front cupping device. Fig. 9 is an end view of the same. Fig. l0 is a planview of the same, and Fig. ll is an enlarged sectional side elevation of the hub in position on the mandrel.

The improved hub-turninglathe is-mounted on a suitably-constructed bed A, supporting at one end bearings A' for a shaft B, carrying a pulley O, connected by belt with other machinery to rotatethe pulley, the latter being adapted to drive the shaftB byasuitable friction-clutch D under the control of the operator manipulating a foot-piece E at the front end of the machine. The shaft Bis provided at its inner end with a socket for the recepa hub.

Serial No. 724,390. (No model.)

i tion of the square F of a mandrel F, en-

gaged by a center G, held longitudinally adjustable in suitable bearings A2, arranged on the end of the frame opposite'the bearing A. 55 A hand-wheel G on the center G serves to turn the latter and shift the same longitudinally to properly engage or disengage the mandrel in the usual manner.

The mandrel F is provided near its middle 6o with a conical part F2, iiuted longitudinally and adapted to be driven into the conical bore of ablock H,cut to about the length of the hub to be finished, but otherwise in a comparatively rough state at the time of being placed, with the mandrel, in the machine. The block H is first roughened by a rougher located at the back of the machine and provided with a knife I operating in conjunction with a steel facing I/ for cutting a thin ribbon from the 7o block H, thus preventing a rank cut, or what is known as hogging in. The knifeI and the steel face I are secured on a bracket I2, attached to the rear side of a table J, mounted to slide transversely in suitable-bearings A3,"adjustably held in a longitudinal direction on guideways A, carried by the bed A.

On the under side of the table J is arranged a transversely-extendin g rack J ,in mesh with a gear-wheel J 2, secured on a longitudinally- 8o extending shaft J3, journaled in the bed A and. carrying at its outer end a hand-wheel J 4, under the control of the operator. A longitudinal sliding motion is given to the bearing A3 by a screw-shaft A5, carryinga hand-wheel S 5 A6 at its outer end to permit of adjusting said bearing, the table J, and the knives carried thereon relatively to the block H, so as to insure a proper formation of the block into On the front side of the table J are carried the peripheral shaping or finishing knives K for turning the peripheral surface of the block after it has been roughened, as hereinafter more fully described, said shaping or finishing knives beingheld vertically adjustable on tool-carriers K, held longitudinally and transversely adjustable on the table J. On the tool-carrier K is also adj ustably held a depth-gage L for lpreventing the shaping or roo finishing knives from making too deep a cut at the time.. (See Figs. 5, 6,.and

On the table J and at the ends thereof are arranged cutting-off or equalizing knives N, held vertically adjustable on tool-holders N, longitudinally and transversely adjustable on the table J by suitable devices. O11 one of the holders N is arranged a depth-gage O for preventing the knives from making too deep a cut at thetime and for insuring even and smooth work, it being understood that the cutting-off or equalizing knives N serve to cut the hub the exact length.

On the inner face of the bearings .A is bolted or otherwise secured a bracket comprising a base P and a longitudinally-disposed arm P', on which arm is mounted to slide a tool-holder Q, carrying the cupper R for forming a cup in one end of the hub, said toolholder Q being provided with a rod Q', fitted to slide longitudinally in the bed A and counected with a lever Q2, under the' control of the operator, for shifting the tool-holder Q and the cupper R longitudinally to move the cupper in engagement with the end of the block to form the cup therein and to move the cupper out of engagement with the block after the cup has been finished. On the bearing A2 of the bed Ais mounted to slide atoolholder S, carrying, the opposite clipper T, similar in arrangement to the cupper R and adapted to engage the other end of the block to form the cup therein. The tool-holder S is connected with a lever U, fulcrumed on the bed A and under the control of the operator for moving the cupper T in and out of engagement with the corresponding end of the hub. Each of the cuppers R and T is provided with a depth-gage V for preventing too deep a cut at the time and for insuring a smooth turning'of the cups.

On the tool-holder Q is held longitudinally adjustable a stop W for limiting the inward sliding of the corresponding cupper and regulating the depth of the cup, it being expressly understood that the gages V, O, and L serve to regulate the depth of an individual cut or shaving.

The operation is as follows: In using the machine the block to be formed into a hub and cut to about the length and bored is driven upon the mandrel F, as described, and shown in Fig. 1l, and then this mandrel is connected with its square end F with the shaft B and engaged at its other end by the center G. The operator presses with his foot the foot-piece E, so that the friction-clutch D connects the shaft B with the revolving pulley O to rotate the shaft B, the mandrel F, and the block H. The operator then turns the hand-wheel J4, so as to impart a transverse movement to the table .I to the front, so that the rougher-knife I moves toward the block and roughens the same. When this has been done, the operator turns the hand-wheel J4 in the opposite direction, so as to cause the rougher to retreat from the roughened block H and to cause the knives K and N to advance toward the block to cut the peripheral face thereof and also to cut the ends to give the length to the hub. When this has been done, t-he operator turns the wheel J4 back a short distance to move the knives K and N out of engagement With the hub, so that the latter stands between the rougher-knife I and the knives K and N with both out of contact with the hub. The operator now moves the levers U and Q either simultaneously or successively to bring the cuppers R and T into action to form the front and rear cups B in the ends of the hub, and when this operation is repeated the cuppers are moved in the opposite direction out of engagement with the hub, and then the center Gr is run out, the mandrel F is removed from the shaft B, and the finished hub 'is driven off the mandrel. The above-described operation is then repeated-that is, another block is put on the mandrel, the latter isinserted in the machine, the block is roughened and turned at its periphery, cut off at the ends, and formed with cups in the end, as above mentioned.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. In a hub-turning lathe, the combination with a bed, of bearings longitudinally adjustable on the bed, means for adjusting the bearings, a table mounted to move transversely on the bearings, gearing for moving the table, a shaft mounted to turn in the bed and connected with said gearing to drive the same, the shaft projecting out from the bed and provided with a hand-wheel, tools mount- IOO ed on the table, means mounted on the bed for holding and turning the work, a toolholder mounted to slide on the bed at the one end thereof, a lever working between the bed and tool-holder to control the latter, a cupping-tool held by said tool-holder, a bracket mounted on the opposite end of the bed, a second tool-holder arranged to slide on said bracket, a second clipping-tool held by said second tool-holder, a rod attached to the second tool-holder and extended rearward, and a lever mounted at the rear of the bed and connected with the said rod.

2. In a hub-turning lathe, the combination with a bed and with devices for holding and turning the work, of cupping-tool holders for each end of the hub mounted on the bed to move longitudinally of the work, a lever at one end of the bed and connected with one cupping-tool holder, to control the same, a rod attached to the other cupping-tool holder and extended to the end of the bed adjacent to said lever, and a second lever connected with the rod to control the cupping-tool holder thereon.

3. In a hub-turning lathe, the combination with the bed and devices for holding, turning and side cuttingthe work, of cupping-tool holders for each end of the hub mounted on the bed, to move longitudinally of the work, and two separate means for controlling said tool-holders to bring them into and out of IIO action, such means extending both to the same bed.

4. -In a hub-turning lathe, the combination With the bed and devices for holding, turning, and side cutting the work, of a ouppingtool holder mounted to slide on the bed at one end thereof, a lever Working between said tool-holder and the bed to move the toolholder, a bracket mounted at the opposite end of the bed, a oupping-tool holder arranged to slide on said bracket, a rod attached to the second-named oupping-tool holder and extended to the end of the bed having the first-named tool-holder, and a lever situated at the said end of the bed and connected with the rod to control the clipping-tool holder thereof.

5. In a hub-turning lathe, the combination A GEORGE A. ENSIGN. Witnesses:

GEORGE W. DEATRICK,

CHARLES I-I. KETTENRING. 

